Medical data sharing scheme based on hybrid encryption with revocable attribute
Guoshuai Liu, Feng Guo, Chuan-Kun Wu · 2023
With the popularization of electronic medical record, internet medical care, AI medical image and other applications, the wave of medical digitization is coming. The electronization of medical data has brought convenience to the sharing of medical data, but it also makes the protection of personal sensitive data in medical data face unprecedented challenges. How to effectively protect personal sensitive information while sharing medical data. In this paper, a hybrid encryption algorithm based on SM4 encryption algorithm and Ciphertext-Policy Attribute-Based Encryption (CP-ABE) with revocable attributes is proposed. The algorithm first uses the SM4 encryption algorithm to encrypt the medical data, and then the SM4 encryption key is used as the encrypted data for encryption by CP-ABE. At the same time, aiming at the requirement of CP-ABE algorithm to revoke attributes, this paper proposes to embed a revocation table in the ciphertext to realize the direct revocation and restore of specific attributes of specific users. Through theoretical analysis and experimental verification, the revocable attribute hybrid encryption algorithm proposed has great advantages for the security and efficiency of personal sensitive information in cloud medical data.